Chinese Optics Letters, 2008, 6 (1): 0112, Published Online: Jan. 29, 2008
A new demodulation technique for optical fiber interferometric sensors with [3×3] directional couplers Download: 1044次
光纤传感器 解调 3×3耦合器 干涉仪 060.2370 Fiber optics sensors 070.6020 Continuous optical signal processing 060.1810 Buffers, couplers, routers,switches, and multiplexers 120.3180 Interferometry
Abstract
Optical fiber interferometric sensors based on [3×3] couplers have been used in many fields. A new technique is proposed to demodulate output signals of this kind of sensors. The technique recovers the signal of interest by fitting coefficients of elliptic (Lissajous) curves between each fiber pair. Different from other approaches, this technique eliminates the dependence on the idealization of [3×3] coupler, provides enhanced tolerance to the variance of photoelectric converters, and is anti-polarization in a certain extent. The main algorithm has been successfully demonstrated both by numerical simulation and experimental result.
Tingting Liu, Jie Cui, Desheng Chen, Ling Xiao, Dexing Sun. A new demodulation technique for optical fiber interferometric sensors with [3×3] directional couplers[J]. Chinese Optics Letters, 2008, 6(1): 0112.